Context Navigation

What's GIS?

​Series of blog posts giving intro to GIS; choice quote from ​an early post: "If you feel like ending a conversation with a developer then simply bring up the topic of character encodings ... [o]r ... coordinate systems. ... So in the spirit of Tim Bray's and Joel Spolsky's wonderful writeups of character encodings, I thought I'd put together a basic survival guide to coordinate systems over my next few posts and then tie it back to Google Maps."

​Geopy calcs distances using (very accurate) ​Vincenty, and uses the ​WGS 84 datum by default. Also has utility functions for UOM conversions.

Questions

When dealing with points (say, degrees) from, do they need to be converted to be useful on the back-end data, assuming -that- data is in degrees? Is it enough to have the same datum and origin? (Reading the intro above is likely to answer the question.)

Implementation

Phase 1

Assume existing data and columns, and that the UOM given is same as backing data.
Support a custom manager (and queryset) to support lookups.